KR102666291B1 - A method of preventing welding defects and short circuits in battery cells using Y-shaped lead tab - Google Patents
A method of preventing welding defects and short circuits in battery cells using Y-shaped lead tab Download PDFInfo
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- KR102666291B1 KR102666291B1 KR1020210106463A KR20210106463A KR102666291B1 KR 102666291 B1 KR102666291 B1 KR 102666291B1 KR 1020210106463 A KR1020210106463 A KR 1020210106463A KR 20210106463 A KR20210106463 A KR 20210106463A KR 102666291 B1 KR102666291 B1 KR 102666291B1
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- 238000003466 welding Methods 0.000 title claims abstract description 95
- 230000007547 defect Effects 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 52
- 230000006727 cell loss Effects 0.000 claims abstract description 12
- 230000002265 prevention Effects 0.000 claims description 42
- 239000011248 coating agent Substances 0.000 claims description 19
- 238000000576 coating method Methods 0.000 claims description 19
- 238000004519 manufacturing process Methods 0.000 claims description 18
- 239000000565 sealant Substances 0.000 claims description 14
- 230000002950 deficient Effects 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 11
- 238000012360 testing method Methods 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 102100028667 C-type lectin domain family 4 member A Human genes 0.000 description 4
- 101000766908 Homo sapiens C-type lectin domain family 4 member A Proteins 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 230000005779 cell damage Effects 0.000 description 1
- 208000037887 cell injury Diseases 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 235000015110 jellies Nutrition 0.000 description 1
- 239000008274 jelly Substances 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/10—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating making use of vibrations, e.g. ultrasonic welding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
- H01M50/557—Plate-shaped terminals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/564—Terminals characterised by their manufacturing process
- H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
- B23K2101/38—Conductors
Abstract
본 발명은 와이자형 리드탭을 이용한 배터리용 셀의 웰딩 불량 및 쇼트 방지 방법에 관한 것으로서, 더욱 상세하게는 적층형 전극무지부를 하나로 엮어주는 Lead Tab을 기존의 일자형에서 Y자 형으로 변경하여 적층형 전극무지부를 감싼 뒤, 초음파 Welding 진행을 통해 배터리용 셀의 웰딩 불량 및 Cell 손실 최소화를 제공하기 위한 와이자형 리드탭을 이용한 배터리용 셀의 웰딩 불량 및 쇼트 방지 방법에 관한 것이다.The present invention relates to a method for preventing welding defects and short circuits in battery cells using Y-shaped lead tabs. More specifically, the lead tab that connects the stacked electrode plain parts is changed from the existing straight shape to a Y shape to prevent the stacked electrode plain parts. This is about a method to prevent welding defects and short circuits in battery cells using a Y-shaped lead tab to minimize welding defects and cell loss through ultrasonic welding after wrapping the part.
Description
본 발명은 와이자형 리드탭을 이용한 배터리용 셀의 웰딩 불량 및 쇼트 방지 방법에 관한 것으로서, 더욱 상세하게는 적층형 전극무지부를 하나로 엮어주는 Lead Tab을 기존의 일자형에서 Y자 형으로 변경하여 적층형 전극무지부를 감싼 뒤, 초음파 Welding 진행을 통해 배터리용 셀의 웰딩 불량 및 Cell 손실 최소화를 제공하기 위한 와이자형 리드탭을 이용한 배터리용 셀의 웰딩 불량 및 쇼트 방지 방법에 관한 것이다.The present invention relates to a method for preventing welding defects and short circuits in battery cells using Y-shaped lead tabs. More specifically, the lead tab that connects the stacked electrode plain parts is changed from the existing straight shape to a Y shape to prevent the stacked electrode plain parts. This is about a method to prevent welding defects and short circuits in battery cells using a Y-shaped lead tab to minimize welding defects and cell loss through ultrasonic welding after wrapping the part.
일반적으로 충전이 불가능한 일차전지와는 달리 충전 및 방전이 가능한 이차전지는 디지털 카메라, 셀룰러 폰, 랩탑 컴퓨터, 파워 툴, 전기 자전거, 전기 자동차, 하이브리드 자동차, 대용량 전력 저장 장치 등 첨단 분야의 개발로 활발한 연구가 진행 중에 있다.Unlike primary batteries, which generally cannot be recharged, secondary batteries that can be charged and discharged are actively being developed in cutting-edge fields such as digital cameras, cellular phones, laptop computers, power tools, electric bicycles, electric vehicles, hybrid vehicles, and large-capacity power storage devices. Research is in progress.
특히, 리튬 이차전지는 기존의 납 축전지, 니켈-카드뮴 전지, 니켈-수소 전지, 니켈-아연전지 등 다른 이차전지와 비교하여 단위 중량 당 에너지 밀도가 높고 급속 충전이 가능하므로 사용의 증가가 활발하게 진행되고 있다.In particular, lithium secondary batteries have a higher energy density per unit weight and can be charged quickly compared to other secondary batteries such as existing lead storage batteries, nickel-cadmium batteries, nickel-hydrogen batteries, and nickel-zinc batteries, so their use is actively increasing. It's going on.
리튬 이차전지는 작동 전압이 36V 이상으로 휴대용 전자 기기의 전원으로 사용되거나, 다수의 전지를 직렬 또는 병렬로 연결하여 고출력의 전기자동차, 하이브리드 자동차, 파워툴, 전기 자전거, 전력저장장치, UPS 등에 사용된다.Lithium secondary batteries have an operating voltage of 36V or higher and are used as a power source for portable electronic devices, or by connecting multiple batteries in series or parallel, they are used in high-output electric vehicles, hybrid vehicles, power tools, electric bicycles, power storage devices, UPS, etc. do.
이러한 리튬 이차전지는 파우치셀 형태로 제작될 수 있다. These lithium secondary batteries can be manufactured in the form of pouch cells.
파우치셀은 젤리롤, 양극 리드탭, 음극 리드탭, 파우치를 포함하는 구성을 가진다.The pouch cell includes a jelly roll, a positive lead tab, a negative lead tab, and a pouch.
한편, 파우치형 리튬이차전지 Cell 제작시, 적층 완료 후, 여러 장의 양극과 음극의 전극무지부를 하나로 엮기 위해 양극 Lead Tab(Aluminum), 음극 Lead Tab(Copper, Nickel 도금)을 Welding하는 공정을 필수로 추가하여 제작하고 있다.Meanwhile, when manufacturing a pouch-type lithium secondary battery cell, after completion of lamination, the process of welding the positive lead tab (Aluminum) and negative electrode lead tab (copper, nickel plating) is essential to weave multiple sheets of positive and negative electrodes into one. We are making additions.
적층이 완료된 Cell이 설계된 용량에 맞추어 작동하기 위해서는 해당 전극들을 하나로 엮어주는 Tab Welding 작업이 중요한 요소 중에 하나이다.In order for the laminated cell to operate according to the designed capacity, tab welding work that connects the electrodes together is one of the important factors.
하지만, 양극 및 음극 Stack수가 늘어나게 되면, 초음파 Welding 진행 시, Lead Tab이 잘 붙지 않아 약한 힘을 가해도 떨어지는 경우가 다수 발생한다. However, when the number of anode and cathode stacks increases, the lead tab does not stick well during ultrasonic welding, and there are many cases where it falls off even when a weak force is applied.
이때, 초음파 Welding을 여러 번 진행하게 되어 Cell 성능 저하 및 양극 및 음극 무지부 절단에 의한 Cell 불량이 발생하여 제작 시 손실되는 전극양이 증가하게 된다.At this time, as ultrasonic welding is performed multiple times, cell performance deteriorates and cell defects occur due to cutting of the anode and cathode uncoated areas, which increases the amount of electrodes lost during manufacturing.
따라서, 본 발명에서는 적층형 전극무지부를 하나로 엮어주는 Lead Tab을 기존의 일자형에서 Y자 형으로 변경하여 적층형 전극무지부를 감싼 뒤, 초음파 Welding 진행을 통해 배터리용 셀의 웰딩 불량 및 Cell 손실 최소화를 제공하기 위한 와이자형 리드탭을 이용한 배터리용 셀의 웰딩 불량 및 쇼트 방지 방법을 제안하게 된 것이다.Therefore, in the present invention, the lead tab that connects the stacked electrode non-coated parts is changed from the existing straight shape to a Y-shape to cover the multi-electrode non-coated parts, and ultrasonic welding is performed to minimize welding defects and cell loss in battery cells. A method to prevent welding defects and short circuits in battery cells using Y-shaped lead tabs was proposed.
따라서, 본 발명은 상기 종래의 문제점을 해소하기 위해 안출된 것으로,Therefore, the present invention was devised to solve the above conventional problems,
본 발명의 목적은 적층형 전극무지부를 하나로 엮어주는 Lead Tab을 기존의 일자형에서 Y자 형으로 변경하여 적층형 전극무지부를 감싼 뒤, 초음파 Welding 진행을 통해 배터리용 셀의 웰딩 불량 및 Cell 손실을 최소화하고자 한다.The purpose of the present invention is to change the Lead Tab, which connects the stacked electrode non-coated parts, from the existing straight shape to a Y-shape, to wrap the multi-electrode non-coated parts, and then to minimize welding defects and cell loss in battery cells through ultrasonic welding. .
본 발명이 해결하고자 하는 과제를 달성하기 위하여, 본 발명의 일실시예에 따른 와이자형 리드탭을 이용한 배터리용 셀의 웰딩 불량 및 쇼트 방지 방법은,In order to achieve the problem that the present invention seeks to solve, a method for preventing welding defects and short circuits in battery cells using a Y-shaped lead tab according to an embodiment of the present invention,
배터리의 웰딩 공정에서, In the battery welding process,
다수 개의 적층된 전극들이 집전된 전극무지부(50)를 제조하는 전극무지부제조단계(S100);와An electrode non-coating area manufacturing step (S100) of manufacturing an electrode non-coating area 50 in which a plurality of stacked electrodes collect current;
불량방지용리드탭(100)의 하측에 상기 전극무지부를 안착시키는 전극무지부불량방지용리드탭안착단계(S200);와A lead tab seating step for preventing electrode non-coating portion defects (S200) of seating the non-electrode portion on the lower side of the lead tab for defect prevention (100);
상기 불량방지용리드탭에 초음파진동기를 이용하여 초음파 진동을 수행함으로써, 전극무지부와 불량방지용리드탭을 웰딩 처리하기 위한 초음파웰딩처리단계(S300);An ultrasonic welding process step (S300) for welding the non-electrode area and the defect prevention lead tab by performing ultrasonic vibration on the defect prevention lead tab using an ultrasonic vibrator;
상기 웰딩 처리 후, 초음파진동기를 이격시킨 후, 불량방지용리드탭이 웰딩 처리된 전극무지부를 획득하는 불량방지용리드탭웰딩전극무지부획득단계(S400);를 포함함으로써, 본 발명의 과제를 해결하게 된다.After the welding treatment, the ultrasonic vibrator is spaced apart, and then the defect prevention lead tab welding electrode non-coating part acquisition step (S400) of obtaining the electrode non-coating part where the defect prevention lead tab is welded is included, thereby solving the problem of the present invention. do.
본 발명인 와이자형 리드탭을 이용한 배터리용 셀의 웰딩 불량 및 쇼트 방지 방법을 통해, Through the method of preventing welding defects and short circuits in battery cells using the Y-shaped lead tab of the present invention,
적층형 전극무지부를 하나로 엮어주는 Lead Tab을 기존의 일자형에서 Y자 형으로 변경하여 적층형 전극무지부를 감싼 뒤, 초음파 Welding 진행을 통해 배터리용 셀의 웰딩 불량 및 Cell 손실을 최소화하는 효과를 제공하게 된다.The lead tab that connects the non-laminated electrodes is changed from the existing straight shape to a Y-shape to cover the non-laminated electrodes, and ultrasonic welding is performed to minimize welding defects and cell loss in battery cells.
따라서, 성능저하 방지와 궁극적으로 배터리 기초 성능과 충전 효율을 향상시킬 수 있는 수명 개선 효과를 제공하게 된다.Therefore, it provides an effect of improving lifespan that can prevent performance degradation and ultimately improve battery basic performance and charging efficiency.
도 1은 종래의 일반적인 일자형 리드탭 측면 모식도이다.
도 2는 일반적인 초음파 웰딩의 원리를 나타낸 개념도이다.
도 3은 본 발명의 일실시예에 따른 와이자형 리드탭을 이용한 배터리용 셀의 웰딩 불량 및 쇼트 방지 방법의 공정도이다.
도 4는 본 발명의 일실시예에 따른 와이자형 리드탭을 이용한 배터리용 셀의 웰딩 불량 및 쇼트 방지 방법을 개략적으로 설명한 예시도이다.
도 5는 본 발명의 일실시예에 따른 와이자형 리드탭을 이용한 배터리용 셀의 웰딩 불량 및 쇼트 방지 방법에서 사용하는 불량방지용리드탭(100)을 나타낸 모식도이다.
도 6은 본 발명의 일실시예에 따른 와이자형 리드탭을 이용한 배터리용 셀의 웰딩 불량 및 쇼트 방지 방법에서 사용하는 불량방지용리드탭(100)을 웰딩한 후를나타낸 불량방지용리드탭(100)의 정면 모식도이다.Figure 1 is a side schematic diagram of a conventional straight lead tab.
Figure 2 is a conceptual diagram showing the principle of general ultrasonic welding.
Figure 3 is a process diagram of a method for preventing welding defects and short circuits in battery cells using a Y-shaped lead tab according to an embodiment of the present invention.
Figure 4 is an example diagram schematically explaining a method for preventing welding defects and short circuits in battery cells using a Y-shaped lead tab according to an embodiment of the present invention.
Figure 5 is a schematic diagram showing a defect prevention lead tab 100 used in a method for preventing welding defects and short circuits in battery cells using a Y-shaped lead tab according to an embodiment of the present invention.
Figure 6 shows the defect prevention lead tab 100 after welding the defect prevention lead tab 100 used in the method of preventing welding defects and short circuits of battery cells using a Y-shaped lead tab according to an embodiment of the present invention. This is a schematic diagram of the front.
본 발명의 일실시예에 따른 와이자형 리드탭을 이용한 배터리용 셀의 웰딩 불량 및 쇼트 방지 방법은,A method for preventing welding defects and short circuits in battery cells using a Y-shaped lead tab according to an embodiment of the present invention,
배터리의 웰딩 공정에서, In the battery welding process,
다수 개의 적층된 전극들이 집전된 전극무지부(50)를 제조하는 전극무지부제조단계(S100);와An electrode non-coating area manufacturing step (S100) of manufacturing an electrode non-coating area 50 in which a plurality of stacked electrodes collect current;
불량방지용리드탭(100)의 하측에 상기 전극무지부를 안착시키는 전극무지부불량방지용리드탭안착단계(S200);와A lead tab seating step for preventing electrode non-coating portion defects (S200) of seating the non-electrode portion on the lower side of the lead tab for defect prevention (100);
상기 불량방지용리드탭에 초음파진동기를 이용하여 초음파 진동을 수행함으로써, 전극무지부와 불량방지용리드탭을 웰딩 처리하기 위한 초음파웰딩처리단계(S300);An ultrasonic welding process step (S300) for welding the non-electrode area and the defect prevention lead tab by performing ultrasonic vibration on the defect prevention lead tab using an ultrasonic vibrator;
상기 웰딩 처리 후, 초음파진동기를 이격시킨 후, 불량방지용리드탭이 웰딩 처리된 전극무지부를 획득하는 불량방지용리드탭웰딩전극무지부획득단계(S400);를 포함하여 구성되는 것을 특징으로 한다.After the welding process, the ultrasonic vibrator is spaced apart, and then a defect prevention lead tab welding electrode non-coating part acquisition step (S400) of obtaining an electrode non-coating part where the defect prevention lead tab has been welded.
이때, 상기 불량방지용리드탭(100)은,At this time, the defect prevention lead tab 100 is,
일정한 크기의 실런트(110);와Sealant 110 of a certain size; and
상기 실런트의 전방 부위에 Y자 형상으로 일정 길이 형성되는 Y자형리드탭상단부(120);와A Y-shaped lead tab upper portion 120 formed in a Y-shape with a certain length in the front portion of the sealant;
상기 실런트의 후방 부위에 일자 형상으로 일정 길이 형성되는 일자형리드탭연장부(130);를 포함하는 것을 특징으로 한다.It is characterized in that it includes a straight lead tab extension portion 130 formed in a straight shape with a certain length at the rear portion of the sealant.
이때, 상기 전극무지부불량방지용리드탭안착단계(S200)는,At this time, the lead tab seating step (S200) for preventing defective electrodes is,
불량방지용리드탭(100)이 Y자 형상일 경우에, Y자형리드탭상단부(120)의 일정 길이를 적층된 전극무지부의 상면과 하면에 각각 접촉되도록 구부리는 공정을 수행하는 것을 특징으로 한다.When the defect prevention lead tab 100 is Y-shaped, a process is performed to bend a certain length of the Y-shaped lead tab upper part 120 so that it contacts the upper and lower surfaces of the stacked electrode-free portion, respectively.
이때, 상기 초음파웰딩처리단계(S300)는,At this time, the ultrasonic welding processing step (S300) is,
일자형 리드탭 대신에 Y자 형상의 불량방지용리드탭(100)으로 변경하여 이를 통해 적층된 전극무지부를 감싸도록 한 후, 초음파 웰딩 처리를 수행함으로써, 웰딩 불량 및 배터리 셀 손실을 방지하는 것을 특징으로 한다.Instead of a straight lead tab, it is changed to a Y-shaped defect prevention lead tab (100) to cover the laminated electrode-free area, and then ultrasonic welding is performed to prevent welding defects and battery cell loss. do.
이때, 상기 불량방지용리드탭(100)의 Y자형리드탭상단부(120)의 길이는,At this time, the length of the Y-shaped lead tab upper part 120 of the defect prevention lead tab 100 is,
전극무지부의 길이보다 작도록 형성시키는 것을 특징으로 한다.It is characterized in that it is formed to be smaller than the length of the electrode-free portion.
이하, 본 발명에 의한 와이자형 리드탭을 이용한 배터리용 셀의 웰딩 불량 및 쇼트 방지 방법의 실시예를 통해 상세히 설명하도록 한다.Hereinafter, a method for preventing welding defects and short circuits in battery cells using a Y-shaped lead tab according to the present invention will be described in detail through examples.
도 1은 종래의 일반적인 일자형 리드탭 측면 모식도이다.Figure 1 is a schematic side view of a conventional straight lead tab.
도 2는 일반적인 초음파 웰딩의 원리를 나타낸 개념도이다.Figure 2 is a conceptual diagram showing the principle of general ultrasonic welding.
도 3은 본 발명의 일실시예에 따른 와이자형 리드탭을 이용한 배터리용 셀의 웰딩 불량 및 쇼트 방지 방법의 공정도이다.Figure 3 is a process diagram of a method for preventing welding defects and short circuits in battery cells using a Y-shaped lead tab according to an embodiment of the present invention.
도 4는 본 발명의 일실시예에 따른 와이자형 리드탭을 이용한 배터리용 셀의 웰딩 불량 및 쇼트 방지 방법을 개략적으로 설명한 예시도이다.Figure 4 is an example diagram schematically explaining a method for preventing welding defects and short circuits in battery cells using a Y-shaped lead tab according to an embodiment of the present invention.
도 5는 본 발명의 일실시예에 따른 와이자형 리드탭을 이용한 배터리용 셀의 웰딩 불량 및 쇼트 방지 방법에서 사용하는 불량방지용리드탭(100)을 나타낸 모식도이다.Figure 5 is a schematic diagram showing a defect prevention lead tab 100 used in a method for preventing welding defects and short circuits in battery cells using a Y-shaped lead tab according to an embodiment of the present invention.
도 6은 본 발명의 일실시예에 따른 와이자형 리드탭을 이용한 배터리용 셀의 웰딩 불량 및 쇼트 방지 방법에서 사용하는 불량방지용리드탭(100)을 웰딩한 후를나타낸 불량방지용리드탭(100)의 정면 모식도이다.Figure 6 shows the defect prevention lead tab 100 after welding the defect prevention lead tab 100 used in the method of preventing welding defects and short circuits of battery cells using a Y-shaped lead tab according to an embodiment of the present invention. This is a schematic diagram of the front.
구체적으로 설명하자면, 도 1에 도시한 바와 같이, 종래의 일반적인 일자형 리드탭은 일정한 크기의 실런트를 중심으로 전방과 후방에 각각 일자형 리드탭이 형성되어 있게 된다.To be specific, as shown in FIG. 1, a conventional straight lead tab has straight lead tabs formed at the front and rear, respectively, centered on a sealant of a certain size.
따라서, 도 2와 같이, 초음파진동기를 구성하는 Anvil 상면에 여러 장의 양극과 음극이 적층된 전극무지부를 안착시킨 후, 그 상면에 일자형리드탭을 위치시킨 후, 그 상면에 Horn을 위치시킨 후 동작시키게 되면 초음파 웰딩을 수행하게 되는 것이다.Therefore, as shown in Figure 2, after seating the electrode-free part on which several sheets of anode and cathode are stacked on the upper surface of the anvil that constitutes the ultrasonic vibrator, placing a straight lead tab on the upper surface, and then positioning the horn on the upper surface and then operating If ordered, ultrasonic welding will be performed.
일반적으로, 파우치형 리튬이차전지 Cell 제작시, 적층 완료 후, 여러 장의 양극과 음극의 전극무지부를 하나로 엮기 위해 양극 Lead Tab(Aluminum), 음극 Lead Tab(Copper, Nickel 도금)을 Welding하는 공정을 필수로 추가하여 제작하고 있다.Generally, when manufacturing a pouch-type lithium secondary battery cell, after completion of lamination, a process of welding the positive lead tab (Aluminum) and negative electrode lead tab (copper, nickel plating) is required to weave multiple sheets of positive and negative electrodes into one. It is being produced by adding .
하지만, 양극 및 음극 Stack수가 늘어나게 되면, 초음파 Welding 진행 시, 일자형 Lead Tab이 잘 붙지 않아 약한 힘을 가해도 떨어지는 경우가 다수 발생한다. However, as the number of anode and cathode stacks increases, the straight lead tab does not stick well during ultrasonic welding, and there are many cases where it falls off even when a weak force is applied.
이때, 초음파 Welding을 여러 번 진행하게 되어 Cell 성능 저하 및 양극 및 음극 무지부 절단에 의한 Cell 불량이 발생하여 제작 시 손실되는 전극양이 증가하게 되는 것이다.At this time, as ultrasonic welding is performed multiple times, cell performance deteriorates and cell defects occur due to cutting of the anode and cathode uncoated areas, which increases the amount of electrodes lost during manufacturing.
반면에 본 발명의 경우, 적층형 전극무지부를 하나로 엮어주는 Lead Tab을 기존의 일자형에서 Y자 형으로 변경하여 적층형 전극무지부를 감싼 뒤, 초음파 Welding 진행을 통해 배터리용 셀의 웰딩 불량 및 Cell 손실 최소화를 제공하게 되는 것이다.On the other hand, in the case of the present invention, the lead tab that connects the non-laminated electrode parts is changed from the existing straight shape to a Y-shape to cover the non-laminated electrode parts, and then ultrasonic welding is performed to minimize welding defects in battery cells and cell loss. It will be provided.
즉, 도 3 내지 도 4에 도시한 바와 같이, 본 발명의 실시예에 따른 와이자형 리드탭을 이용한 배터리용 셀의 웰딩 불량 및 쇼트 방지 방법은,That is, as shown in Figures 3 and 4, the method for preventing welding defects and short circuits in battery cells using a Y-shaped lead tab according to an embodiment of the present invention is,
배터리의 웰딩 공정에서, In the battery welding process,
다수 개의 적층된 전극들이 집전된 전극무지부(50)를 제조하는 전극무지부제조단계(S100);와An electrode non-coating area manufacturing step (S100) of manufacturing an electrode non-coating area 50 in which a plurality of stacked electrodes collect current;
불량방지용리드탭(100)의 하측에 상기 전극무지부를 안착시키는 전극무지부불량방지용리드탭안착단계(S200);와A lead tab seating step for preventing electrode non-coating portion defects (S200) of seating the non-electrode portion on the lower side of the lead tab for defect prevention (100);
상기 불량방지용리드탭에 초음파진동기를 이용하여 초음파 진동을 수행함으로써, 전극무지부와 불량방지용리드탭을 웰딩 처리하기 위한 초음파웰딩처리단계(S300);An ultrasonic welding process step (S300) for welding the non-electrode area and the defect prevention lead tab by performing ultrasonic vibration on the defect prevention lead tab using an ultrasonic vibrator;
상기 웰딩 처리 후, 초음파진동기를 이격시킨 후, 불량방지용리드탭이 웰딩 처리된 전극무지부를 획득하는 불량방지용리드탭웰딩전극무지부획득단계(S400);를 포함하게 된다.After the welding process, the ultrasonic vibrator is spaced apart, and a defect prevention lead tab welding electrode non-coated part acquisition step (S400) of obtaining an electrode non-coated part where the defect prevention lead tab has been welded is included.
본 발명은 상기와 같은 제조 과정을 거치게 되고, 이를 통해 적층형 전극무지부를 하나로 엮어주는 Lead Tab을 기존의 일자형에서 Y자 형으로 변경하여 적층형 전극무지부를 감싼 뒤, 초음파 Welding 진행을 통해 배터리용 셀의 웰딩 불량 및 Cell 손실 최소화를 제공할 수 있게 됨으로써, 궁극적으로 배터리 기초 성능과 충전 효율을 향상시킬 수 있는 수명 개선 효과를 제공하게 된다.The present invention goes through the above manufacturing process, and through this, the Lead Tab that connects the stacked electrode non-coated parts is changed from the existing straight shape to a Y-shape to cover the stacked electrode non-coated parts, and then the battery cell is processed through ultrasonic welding. By being able to minimize welding defects and cell loss, it ultimately provides an improvement in battery life that can improve basic performance and charging efficiency.
다음은 본 발명인 와이자형 리드탭을 이용한 배터리용 셀의 웰딩 불량 및 쇼트 방지 방법에 대하여 구체적으로 설명하도록 하겠다.Next, we will explain in detail the method of preventing welding defects and short circuits in battery cells using the Y-shaped lead tab of the present invention.
상기 전극무지부제조단계(S100)는 다수 개의 적층된 전극들이 집전된 전극무지부(50)를 제조하는 과정이다.The electrode-free area manufacturing step (S100) is a process of manufacturing an electrode-free area 50 in which a plurality of stacked electrodes collect current.
즉, 양극와 음극을 일정한 길이로 잘라 양극과 음극을 적층하게 되는데, 이를 전극무지부라 하는 것이다.In other words, the anode and cathode are cut to a certain length and the anode and cathode are stacked, which is called an electrode-free area.
이후, 상기 전극무지부불량방지용리드탭안착단계(S200)는 불량방지용리드탭(100)의 하측에 상기 전극무지부를 안착시키는 과정이다.Thereafter, the lead tab seating step for preventing defective electrode non-coating portions (S200) is a process of seating the non-electrode portion on the lower side of the lead tab 100 for preventing defects.
구체적으로 상기 불량방지용리드탭(100)은,Specifically, the defect prevention lead tab 100,
일정한 크기의 실런트(110);와Sealant 110 of a certain size; and
상기 실런트의 전방 부위에 Y자 형상으로 일정 길이 형성되는 Y자형리드탭상단부(120);와A Y-shaped lead tab upper portion 120 formed in a Y-shape with a certain length in the front portion of the sealant;
상기 실런트의 후방 부위에 일자 형상으로 일정 길이 형성되는 일자형리드탭연장부(130);를 포함하는 것을 특징으로 한다.It is characterized in that it includes a straight lead tab extension portion 130 formed in a straight shape with a certain length at the rear portion of the sealant.
즉, 도 5에 도시한 바와 같이, 일정한 크기의 실런트(110)가 존재하고, 상기 실런트의 전방 부위에 Y자 형상으로 일정 길이로 Y자형리드탭상단부(120)를 형성하게 된다.That is, as shown in FIG. 5, there is a sealant 110 of a certain size, and a Y-shaped lead tab upper part 120 is formed in a Y shape with a certain length in the front part of the sealant.
그리고, 실런트의 후방 부위에 일자 형상으로 일정 길이로 일자형리드탭연장부(130)를 형성하게 된다.Then, a straight lead tab extension 130 is formed in a straight shape with a certain length at the rear portion of the sealant.
일반적으로 배터리 셀의 밀봉 처리를 위한 폴리머 재질의 실런트가 형성되어 있으며, 여기에 본 발명에서는 전방 부위에 Y자 형상으로 일정 길이로 Y자형리드탭상단부(120)를 형성하고, 후방 부위에 일자 형상으로 일정 길이로 일자형리드탭연장부(130)를 형성하게 되는 것이다.Generally, a sealant made of a polymer material is formed for sealing the battery cell. Here, in the present invention, a Y-shaped lead tab upper part 120 is formed in a Y shape with a certain length at the front part and a straight shape at the rear part. This forms a straight lead tab extension 130 of a certain length.
따라서, 상기 전극무지부불량방지용리드탭안착단계(S200)는,Therefore, the lead tab seating step (S200) for preventing defective electrodes is,
불량방지용리드탭(100)이 Y자 형상일 경우에, Y자형리드탭상단부(120)의 일정 길이를 적층된 전극무지부의 상면과 하면에 각각 접촉되도록 구부리는 공정을 수행하는 것을 특징으로 한다.When the defect prevention lead tab 100 is Y-shaped, a process is performed to bend a certain length of the Y-shaped lead tab upper part 120 so that it contacts the upper and lower surfaces of the stacked electrode-free portion, respectively.
예를 들어, 가로 길이가 10cm라면, 끝단에서 3cm 부위를 구부리게 되는 것이다.For example, if the horizontal length is 10cm, 3cm from the end will be bent.
왜냐하면, Y자형이기 때문에 구부리는 공정을 수행하지 않게 되면, HORN과 ANVIL 과의 거리가 멀어져 초음파 웰딩 처리가 불가능하거나, 효율이 떨어지기 때문에 구부림 공정을 실시하여 불량방지용리드탭(100)이 전극무지부의 상면과 하면에 각각 접촉되도록 하는 것이다.Because it is Y-shaped, if the bending process is not performed, the distance between the horn and the anvil becomes large, making ultrasonic welding impossible, or the efficiency is low, so the bending process is performed so that the lead tab 100 for defect prevention is made of an electrode. The purpose is to make contact with the upper and lower surfaces of the unit, respectively.
그리고, HORN과 ANVIL을 이용하여 불량방지용리드탭(100)을 전극무지부의 상면과 하면에 각각 접촉되도록 각각 하강 및 상승을 수행하게 되면 무리하게 압력을 가하기 때문에 전극무지부에 외력이 가해져 불량율이 높아질 수 있으며, HORN과 ANVIL에 파손되는 문제점이 발생하기 때문에 초음파 동작 전에 사전 공정으로 구부림 공정을 수행하는 것이다.In addition, when the lead tab for preventing defects (100) is lowered and raised using HORN and ANVIL to contact the upper and lower surfaces of the electrode-free part, excessive pressure is applied, and external force is applied to the electrode-free part, increasing the defect rate. Since problems such as damage to horn and anvil occur, a bending process is performed as a pre-process before ultrasonic operation.
또한, 상기 불량방지용리드탭(100)의 Y자형리드탭상단부(120)의 길이는,In addition, the length of the Y-shaped lead tab upper part 120 of the defect prevention lead tab 100 is,
전극무지부의 길이보다 작도록 형성시키는 것을 특징으로 한다.It is characterized in that it is formed to be smaller than the length of the electrode-free portion.
즉, 길이가 전극무지부의 길이보다 길게 형성되면 리드탭의 일측이 전극무지부의 끝단 밖으로 노출되기 때문에 레이저 커팅 공정을 추가적으로 수행하여야 하므로 가급적 상기 조건을 만족시켜야 한다.In other words, if the length is longer than the length of the electrode-free part, one side of the lead tab is exposed outside the end of the electrode-free part, so an additional laser cutting process must be performed, so the above conditions must be satisfied as much as possible.
그리고, 상기 초음파웰딩처리단계(S300)는,And, in the ultrasonic welding processing step (S300),
일자형 리드탭 대신에 Y자 형상의 불량방지용리드탭(100)으로 변경하여 이를 통해 적층된 전극무지부를 감싸도록 한 후, 초음파 웰딩 처리를 수행함으로써, 웰딩 불량 및 배터리 셀 손실을 방지하는 것을 특징으로 한다.Instead of a straight lead tab, it is changed to a Y-shaped defect prevention lead tab (100) to cover the laminated electrode-free area, and then ultrasonic welding is performed to prevent welding defects and battery cell loss. do.
일반적으로 초음파 진동은 일정 Hz 이상의 초음파 진동을 이용하여 순간적으로 진동 마찰열을 발생시켜 전극무지부가 금속으로 이루어진 Y자형리드탭상단부(120)에 붙게 되는 것이다.In general, ultrasonic vibration uses ultrasonic vibration of a certain Hz or higher to instantaneously generate vibration friction heat so that the electrode-free portion is attached to the upper part 120 of the Y-shaped lead tab made of metal.
그리고, 불량방지용리드탭웰딩전극무지부획득단계(S400)는 상기 웰딩 처리 후, 초음파진동기를 이격시킨 후, 불량방지용리드탭이 웰딩 처리된 전극무지부를 획득하는 과정이다.And, the defect prevention lead tab welding electrode non-coated area acquisition step (S400) is a process of obtaining the electrode non-coated area where the defect prevention lead tab has been welded after the ultrasonic vibrator is spaced apart after the welding process.
즉, 초음파진동기를 이용하여 일정 시간 웰딩 처리한 후, 초음파진동기를 웰딩 처리된 전극무지부로부터 이격시키게 되고, 불량방지용리드탭이 웰딩 처리된 전극무지부를 획득하게 되는 것이다.That is, after welding for a certain period of time using an ultrasonic vibrator, the ultrasonic vibrator is separated from the welded electrode-free part, and the defect prevention lead tab obtains the welded electrode-free part.
상기와 같이, 제조되게 되면 도 6에 도시한 바와 같이, Y자 Lead Tab을 통해 기존 1자형 Lead Tab 보다 전극무지부를 Pocket 형태로 감싸 주게 되어 Stack수가 많은 Cell의 경우, Welding 불량에 따른 성능 저하 문제를 감소시킨다.When manufactured as above, as shown in Figure 6, the non-electrode area is wrapped in a pocket shape through the Y-shaped lead tab rather than the existing single-shaped lead tab, so in the case of cells with a large number of stacks, there is a problem of performance degradation due to poor welding. decreases.
또한, 지속적인 Welding 반복에 따른 전극무지부가 뭉개지거나, 절단되는 현상이 발생하지 않아, 손실되는 전극에 따른 손실을 감소할 수 있게 되는 것이다.In addition, the phenomenon of crushing or cutting of the electrode-free area due to continuous welding repetition does not occur, thereby reducing loss due to lost electrodes.
위에서 상술한 바와 같이 본 발명의 효과를 파악하기 위해 와이자형 리드탭을 이용한 초음파 웰딩 처리된 배터리의 기초성능 및 수명시험을 하였다.As described above, in order to determine the effectiveness of the present invention, basic performance and lifespan tests were conducted on batteries subjected to ultrasonic welding using Y-shaped lead tabs.
후술하는 종래품이라 함은, 출원인이 제조하는 배터리에 사용하는 일반적인 일자형 리드탭을 포함하는 제품을 말하며, 개선품은 본 발명의 제조 방법을 통해 제조된 와이자형 리드탭을 포함하는 제품을 말한다.The conventional product described later refers to a product including a general straight lead tab used in the battery manufactured by the applicant, and the improved product refers to a product including a Y-shaped lead tab manufactured through the manufacturing method of the present invention.
또한, 본 발명의 개선품 효과를 입증하기 위하여 1C Capacity & DCIR 측정 시험과 Cycle 시험을 진행하였다. In addition, 1C Capacity & DCIR measurement tests and cycle tests were conducted to prove the effectiveness of the improved product of the present invention.
1) 1C Capacity & DCIR 측정 시험(6Ah Cell)1) 1C Capacity & DCIR measurement test (6Ah Cell)
만충전된 시료를 상온(25±2℃)에서 1C로 충방전을 진행하며 Discharge 진행 시 측정되는 Capacity 값을 통해 해당 Cell의 Wellding 불량을 알 수 있다.A fully charged sample is charged and discharged at 1C at room temperature (25±2°C), and the welding defect of the cell can be identified through the capacity value measured during discharge.
이후 Cell을 만충전 후 1C 방전을 통해 SOC50%의 상태로 맞춘 뒤 10C, 10초 방전을 통하여 DCIR 값을 얻을 수 있다. Afterwards, after fully charging the cell, set the SOC to 50% through 1C discharge, and then discharge at 10C for 10 seconds to obtain the DCIR value.
시험결과, 접촉불량이 없어 전지전도도가 높아 개선품이 종래품 대비 DCIR값이 약 24% 낮게 측정되었다.As a result of the test, the DCIR value of the improved product was measured to be about 24% lower than that of the conventional product because there was no contact defect and the battery conductivity was high.
상기와 같은 결과를 나타낸 것은 Y자 형 리드탭으로 변경하여 적층형 전극무지부를 감싼 뒤, 초음파 Welding 진행을 통해 배터리용 셀의 웰딩 불량 및 Cell 손실을 최소화할 수 있었기에 가능한 것으로 분석되고, 최종적으로 배터리의 기초성능 및 수명을 향상시키는 것이다.It is analyzed that the results shown above were possible because we were able to minimize welding defects and cell loss in battery cells through ultrasonic welding after changing to a Y-shaped lead tab to cover the non-laminated electrode area. It improves basic performance and lifespan.
따라서, 상기한 특성을 지니는 배터리 셀을 본 발명에서 도입하게 된 것이며, 이를 통해 기초성능 및 수명을 향상하는 효과를 제공할 수 있게 되었다.Accordingly, a battery cell having the above-mentioned characteristics was introduced in the present invention, and through this, it was possible to provide the effect of improving basic performance and lifespan.
2) Cycle 시험2) Cycle test
한편, 상기 표 2는 배터리 성능 평가 중 Cycle 수명에 관한 비교표로서, 일반적인 일자형 리드탭을 적용한 종래품의 경우에는 Cycle 수명이 982 Cycle로 나타났으며, Y자형 리드탭을 적용한 개선품의 경우에는 Cycle 수명이 1024 Cycle로 나타났다.Meanwhile, Table 2 above is a comparison table regarding cycle life during battery performance evaluation. In the case of a conventional product using a general straight lead tab, the cycle life was found to be 982 cycles, and in the case of an improved product using a Y-shaped lead tab, the cycle life was 982 cycles. It appeared as 1024 Cycle.
이는 Y자형 리드탭을 적용함으로써, Cycle 수명이 약 5% 증대함을 알 수 있었다.It was found that by applying the Y-shaped lead tab, cycle life increased by about 5%.
즉, 다른 제조 조건을 동일하지만, 리드탭 만의 교체를 통해서도 기초 성능 향상과 수명 향상에 도움을 줄 수 있음을 실험을 통해 알 수 있었으며, 이는 실제 웰딩 공정시 웰딩 불량과 셀 손상이 발생하고 있음을 나타낸 것이다.In other words, although other manufacturing conditions were the same, it was found through experiments that replacement of only the lead tab could help improve basic performance and lifespan. This shows that welding defects and cell damage occur during the actual welding process. It is shown.
따라서, 적층형 전극무지부를 하나로 엮어주는 Lead Tab을 기존의 일자형에서 Y자 형으로 변경하여 적층형 전극무지부를 감싼 뒤, 초음파 Welding 진행을 통해 배터리용 셀의 웰딩 불량 및 Cell 손실을 최소화하는 효과를 제공할 수 있음을 알 수 있었다.Therefore, the lead tab that connects the stacked electrode uncoated parts is changed from the existing straight shape to a Y shape to cover the stacked electrode uncoated parts, and ultrasonic welding is performed to provide the effect of minimizing welding defects and cell loss in battery cells. I found out that it was possible.
상기와 같은 방법을 통해, 성능저하 방지와 궁극적으로 배터리 기초 성능과 충전 효율을 향상시킬 수 있는 수명 개선 효과를 제공하게 된다.Through the above method, it provides an effect of improving lifespan that can prevent performance degradation and ultimately improve battery basic performance and charging efficiency.
상기와 같은 내용의 본 발명이 속하는 기술분야의 당업자는 본 발명의 기술적 사상이나 필수적 특징을 변경하지 않고서 다른 구체적인 형태로 실시될 수 있다는 것을 이해할 수 있을 것이다. 그러므로 이상에서 기술한 실시 예들은 모든 면에서 예시된 것이며 한정적인 것이 아닌 것으로서 이해해야만 한다. Those skilled in the art to which the present invention pertains as described above will understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features. Therefore, the embodiments described above should be understood in all respects as illustrative and not limiting.
S100 : 전극무지부제조단계
S200 : 전극무지부불량방지용리드탭안착단계
S300 : 초음파웰딩처리단계
S400 : 불량방지용리드탭웰딩전극무지부획득단계S100: Electrode-free part manufacturing stage
S200: Lead tab seating step to prevent defective electrodes
S300: Ultrasonic welding processing step
S400: Lead tab welding electrode no part acquisition stage for defect prevention
Claims (4)
배터리의 웰딩 공정에서,
다수 개의 적층된 전극들이 집전된 전극무지부(50)를 제조하는 전극무지부제조단계(S100);와
불량방지용리드탭(100)의 하측에 상기 전극무지부를 안착시키는 전극무지부불량방지용리드탭안착단계(S200);와
상기 불량방지용리드탭에 초음파진동기를 이용하여 초음파 진동을 수행함으로써, 전극무지부와 불량방지용리드탭을 웰딩 처리하기 위한 초음파웰딩처리단계(S300);와
상기 웰딩 처리 후, 초음파진동기를 이격시킨 후, 불량방지용리드탭이 웰딩 처리된 전극무지부를 획득하는 불량방지용리드탭웰딩전극무지부획득단계(S400);를 포함하는 것을 특징으로 하며,
상기 불량방지용리드탭(100)은,
일정한 크기의 실런트(110);와
상기 실런트의 전방 부위에 Y자 형상으로 일정 길이 형성되는 Y자형리드탭상단부(120);와
상기 실런트의 후방 부위에 일자 형상으로 일정 길이 형성되는 일자형리드탭연장부(130);를 포함하는 것을 특징으로 하며,
상기 전극무지부불량방지용리드탭안착단계(S200)는,
불량방지용리드탭(100)이 Y자 형상일 경우에, Y자형리드탭상단부(120)의 일정 길이를 적층된 전극무지부의 상면과 하면에 각각 접촉되도록 구부리는 공정을 수행하는 것을 특징으로 하며,
상기 초음파웰딩처리단계(S300)는,
일자형 리드탭 대신에 Y자 형상의 불량방지용리드탭(100)으로 변경하여 이를 통해 적층된 전극무지부를 감싸도록 한 후, 초음파 웰딩 처리를 수행함으로써, 웰딩 불량 및 배터리 셀 손실을 방지하는 것을 특징으로 하는 와이자형 리드탭을 이용한 배터리용 셀의 웰딩 불량 및 쇼트 방지 방법.
In a method for preventing welding defects and short circuits in battery cells using Y-shaped lead tabs,
In the battery welding process,
An electrode non-coating area manufacturing step (S100) of manufacturing an electrode non-coating area 50 in which a plurality of stacked electrodes collect current;
A lead tab seating step for preventing electrode non-coating portion defects (S200) of seating the non-electrode portion on the lower side of the lead tab for defect prevention (100);
An ultrasonic welding process step (S300) for welding the electrode-free area and the defect prevention lead tab by performing ultrasonic vibration on the defect prevention lead tab using an ultrasonic vibrator;
After the welding treatment, the ultrasonic vibrator is spaced apart, and then a defect prevention lead tab welding electrode non-coating part acquisition step (S400) of obtaining an electrode non-coating part where the defect prevention lead tab is welded,
The lead tab 100 for preventing defects is,
Sealant 110 of a certain size; and
A Y-shaped lead tab upper portion 120 formed in a Y-shape with a certain length in the front portion of the sealant;
Characterized in that it includes a straight lead tab extension 130 formed in a straight shape at a certain length at the rear portion of the sealant,
The lead tab seating step (S200) for preventing defective electrodes is,
When the defect prevention lead tab 100 is Y-shaped, a process is performed to bend a certain length of the Y-shaped lead tab upper part 120 so that it contacts the upper and lower surfaces of the laminated electrode-free portion, respectively.
The ultrasonic welding processing step (S300),
Instead of a straight lead tab, it is changed to a Y-shaped defect prevention lead tab (100) to cover the laminated electrode-free area, and then ultrasonic welding is performed to prevent welding defects and battery cell loss. How to prevent welding defects and short circuits in battery cells using Y-shaped lead tabs.
상기 불량방지용리드탭(100)은,
Y자 형상인 것을 특징으로 하는 와이자형 리드탭을 이용한 배터리용 셀의 웰딩 불량 및 쇼트 방지 방법.
According to clause 1,
The lead tab 100 for preventing defects is,
A method of preventing welding defects and short circuits in battery cells using Y-shaped lead tabs, which are characterized in that they are Y-shaped.
상기 불량방지용리드탭(100)이 Y자 형상일 경우에 길이는,
전극무지부의 길이보다 작도록 형성시키는 것을 특징으로 하는 와이자형 리드탭을 이용한 배터리용 셀의 웰딩 불량 및 쇼트 방지 방법.
According to clause 2,
When the defect prevention lead tab 100 is Y-shaped, the length is,
A method for preventing welding defects and short circuits in battery cells using a Y-shaped lead tab, which is formed to be smaller than the length of the electrode-free portion.
제조된 불량방지용리드탭이 웰딩 처리된 전극무지부을 포함하고 있는 배터리.By the method of paragraph 1,
A battery in which the manufactured lead tab for preventing defects includes a welded electrode-free area.
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